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Error code reference

Jenn-Air Microwave Error Code F33

Meat Probe Jack or Meat Probe failure detected.

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Meat Probe Jack or Meat Probe failure detected.

First step from the service manual

Check meat probe jack and meat probe connections and resistance values.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What F33 means on a Jenn-Air microwave

The F33 error code on a Jenn-Air microwave indicates the control board has detected a fault in the meat probe circuit. This includes either the meat probe jack (the receptacle inside the cavity where the probe plugs in) or the meat probe itself. The board monitors resistance values through this circuit and throws F33 when those values fall outside the expected range or when continuity is lost entirely. Diagnosing this code requires checking both the probe and the jack for proper resistance readings and secure connections.

If you use your Jenn-Air microwave's temperature probe feature to cook meats to a target internal temperature, this error means the appliance has lost confidence in that sensor circuit. The meat probe is a temperature-sensing skewer you insert into food, and it connects to the microwave through a small jack port inside the cooking cavity. When the control board cannot read a valid signal from this circuit, it displays F33 and disables the probe cooking function.

The fault can originate from a damaged probe, a corroded or physically damaged jack, or wiring between the jack and the control board. Start diagnosis by inspecting the probe and jack visually, then use a multimeter to check resistance values on both components. A functioning probe should show a specific resistance range at room temperature, typically around 50,000 to 60,000 ohms depending on the model.

Source: manufacturer service documentation.

Common causes of F33

  1. 01

    Damaged or failed meat probe

    Part replacement

    The meat probe itself can fail due to physical damage, exposure to excessive heat, or internal wire breakage. A damaged probe will read an open circuit or incorrect resistance when tested with a multimeter.

  2. 02

    Corroded or damaged meat probe jack

    Part replacement

    The jack inside the microwave cavity where the probe plugs in can corrode from food splatter or moisture, or sustain physical damage from rough handling. A faulty jack will prevent proper electrical contact and cause the board to read an invalid signal.

  3. 03

    No probe connected with probe mode active

    Wiring / connection

    If the microwave is set to probe cooking mode but no meat probe is inserted into the jack, the control board will detect an open circuit and may display F33. Inserting the probe or canceling the probe cooking cycle can clear this condition.

  4. 04

    Wiring harness fault between probe jack and control board

    Part replacement

    The wire harness connecting the meat probe jack to the main control board can develop an open or short due to pinching, heat damage, or connector corrosion. This requires tracing and testing the wiring between both components.

See the test procedure for each cause

Frequently asked questions about F33

What does the F33 error code mean on a Jenn-Air microwave?
F33 means the control board has detected a failure in the meat probe circuit. This covers either the meat probe jack inside the cavity or the meat probe accessory itself. The board monitors resistance values from this circuit, and F33 triggers when those values are missing or out of range.
How do I fix the F33 error code on my Jenn-Air microwave?
Start by removing the meat probe from the jack and pressing Cancel to clear the code. If F33 returns or the probe cooking feature does not work, test the probe's resistance with a multimeter at room temperature and compare it to the value listed in your service manual. If the probe reads open or significantly out of spec, replace the probe. If the probe tests good, inspect the jack for corrosion or damage and check the wiring harness from the jack to the control board.
Can I still use my Jenn-Air microwave if it shows F33?
In most cases, yes. F33 is specific to the meat probe circuit, so standard microwave cooking functions typically remain available. However, you will not be able to use the temperature probe cooking feature until the fault is resolved. If the error appears during normal cooking with no probe connected, clear the code and monitor whether it returns before using the appliance further.
How much does it cost to fix F33 on a Jenn-Air microwave?
If the meat probe is the cause, a replacement Jenn-Air compatible meat probe typically costs $20 to $50 and is a simple plug-in replacement with no tools required. A replacement meat probe jack is a parts cost of roughly $30 to $80, but installation requires disassembling the microwave cavity and is better suited to a technician. If the control board is involved, parts and labor can reach $200 or more, though board replacement for F33 alone is uncommon.
How do I test the meat probe to diagnose F33 on a Jenn-Air microwave?
Unplug the probe from the jack and set a multimeter to measure resistance (ohms). Touch the probes to the two electrical contacts on the probe's plug end. At room temperature, a functional meat probe should show a resistance reading consistent with your model's service specifications, commonly in the range of 50,000 to 60,000 ohms. An open circuit reading or a reading near zero indicates a failed probe that needs replacement.

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